You are the happiest when you are the most focused. You are the unhappiest when you are the most distracted.
If you want to be miserable, be halfway committed to things.
Halfway committed to your business, halfway committed to your spouse, halfway committed to your faith, halfway committed to your kids, halfway committed to your process, halfway committed to your principles.
The world wants us to believe "halfway committed" is freedom of choice. You are simply keeping your options open - the ability to change course. It seems more productive to have multiple options. It's quite the opposite.
Halfway committed is misery because no one ever sees your full potential. Not even you.
Total commitment is freedom. Total commitment is happiness. Once you find your principles, you must fully commit to them. Anything less is a waste of time.
Distractions come in many different forms. The shiny new ideas that tantalize us but are missing our core principles for investment. The mind games our emotions (greed, fear, boredom) play on us making us sell positions/or buy new ones that we shouldn't. The opinions and criticisms we internalize from investors that haven't done the work. Distractions are anything that causes us to lose focus.
Discipline means having the strength to say no to the thousands of things that distract you.
Courage means having the strength to say yes to the few things that matter.
Commitment means having unwavering confidence in yourself and your principles.